A sterile bone screw spinal implant assembly intended to be used for spinal dynamic stabilization (i.e., soft stabilization), a surgical method different from spinal fixation in that it allows slight mobility between the unstable vertebral segments in the spine. It consists of a combination of pedicle screws, spacers, and a flexible synthetic polymer cord and titanium (Ti) rods used as the longitudinal member; conventional and specialized surgical instruments may also be included. The system is intended to treat various lumbar, thoracic, and/or sacral spinal instabilities and deformities (e.g., degenerative spondylolisthesis, pseudoarthrosis) typically as an adjunct to spinal fusion.